Milking apparatus.



A0. G. RIESKE.

yMILKING APPARATUS.

APPLICATION FILED JAN. 1a, 1912.

Patented Oct. '7, 1913.

2 SHEETS-SHEBT l.

139 M15 Atomwy 0. G. RIESKE.

MILKING APPARATUS.

APPLICATION FILED JAN. 18, 1912.

Patented Oct. 7, 1913.

2 SHEETS-SHEET Z.

M* Invgenu IINITE@ STATES PATENT FFICE.

OTTO GEORGE RIESKE, OF BEAVER DAM, WISCONSIN, yASSIGNOIR TO ALBERT J'. EUCHENHOFNER, 0F INDIANAPOLIS, INDIANA.

. MILKING APPARATUS.

Specification of Letters Patent.

Application filed January 18, 1912. Serial No. $71,881.

To atl whom t may concern.'

Be it known'that I, OTTO GEORGE Rinske, a citizen of the United States, residing at Beaver Dam, in the county of Dodge. and State of Wisconsin, have invented certain new and useful Improvements in Milking Apparatus; and I do hereby declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide a milkin apparatus improved in the several particulars hereinafter noted, and to such ends, generally stated, the invention consists of the novel devices andcombinations of devices hereinafter described and defined in the claims.

In milking apparatus, it has been customary to rely chieiiy or entirely upon suction to draw the milk from the cows teats, and this suction, when strong enough to be e'ective in the milking action, has been found to be so strong that it will draw blood, if permitted to run after the cow has been milked dry. This series defect'has rendered milking apparatus. operating on the suction plan, practically worthless for commarcial purposes. y

My invention provides a milking apparatus including an improved teat cup and cooperating devices, which, in the milking action, very closely simulates that` of the hand milking action. The milking is performed without suction, but by pressure on the .teat which irst compresses and chokes the teat close to the bag, and then squeezes the lower portion of the teat to eject the milk. This action may be produced in many die-rent ways, but preferably, I acs complish the same bythe use of a teat cup comprising a rigid casing and elastic pneumatically actuated so-called teat choking ring, andan elastic pneumatic actuated so-` called teat squeezingpad. In connection with this improved teat cup, I provide an intermittently acting air complressor having connections to the said c cking ring and squeezing pad, and also preferably provide in the said connections, means whereby a relatively hivh pressure will first be ad- Initted to the cIiokmg ring and a relatively low pressure will be, a little later, admitted to the squeezin pad.

The improve milking apparatus is illus- .trated in the accompanying drawings Wherein like characters indicate like parts through.- out the several views. l

Referring to .the drawings, Figure 1 is a plan View of that portion of the milking apparatus which is adapted to be attachedto the cow; Fig. 2 is a vertical section showing a reciprocatory cylinder and piston air compressor used in connection with the ap.- paratus; Fig. 2a is a plan view of the parts shown in Fig. 2; Fig. 3 is a view partly in side elevation and partly in section showing two of the teat cups applied to a cows teatsg. Figs. 4 and 5 .are vertical sections showing the teat cu applied to a cows teat and illustrating. di erent progressions in the action thereof; and Fig. 6 is a horizontal sectibn taken on the line m me on Fig. It. "y

First considering the construction of the teat cup, perse, the numeral 1 indicates the outer metal casing of the teat cup, the saine vpreferably being made up of two sections connected by hinges 2, and a spring latch.

3, so that the said casing may be erred up and then closed onto the teat y. n its. upper portion, the casing l has an outwardly pressed bead 4 in which a soft rit-b ber tube 5 is seated. This tube 5 constitutes what, for convenience, I herein designate as a teat choking ring, and it is provided with an outwardly extended nipple 6 seated in the nipple-like projection 'i' of the cas; lng l.

Located in the main and relatively ned `section of the casing 1, just below the chollr ing ring 5,-and extending downward near y. or quite to the open lower end o f casing, is a soft rubberpad or'bag 8, which, for convenience, I herein designate as a squeezing pad. This squeezing pad, so.- called, might be annular in form like the ring 5, but preferably, is not so constructed.

It 1s shown as provided with a projectingy nipple 9 seated in a nipple-like projection, 10 of the casing l.

As an important feature in the-'construc tion of the squeezing ad, or bag 8, its inner Wall, which engages t e teat, is made thickest at its lower portion, and is made .gradually thinner toward its up er portion, so that when air is introduce into the said pad, it will expand first at its upper pcrtiurj` anl later at itsllower portion. f

n the. C0 efe equipment .0.1" one cow, foifiipteat cups are provided an choking ring livery ends of other flexible air supply tubes 15. The four. air tubes 14 are, as shown, connected to a common exible air tube 16, and likewise, the four air tubes 15 are shown as connected to a single `flexible air tube 17. In` the arrangement illustrated, the main tubes 16 and 17 are independently connected to different cylinders of a two-cylinder reciprocating air compressor which will now be described.

Referring to Fig. 2, the numeral 18 indicates the cylinders and the numeral 19 the pistons of the two cylinder air compressors. The pistons in the two cylinders are independently connected by connecting rods 20 to cranks 21 and 21a of a power driven crank shaft 22. The crank 2l'is set slightly ahead of the crank 21a for an important purpose which will presently appear. Each cylinder 18, in its upper end or lie'ad, is provided with an air intake pipe 28 and an air discharge pipe 24. In each air intake pipe 23,

is a valve casing 25, in which is an upwardly spring-pressed 'check valve 26. In each air discharge pipe 24 is a valve casing 27 having an upwardly open downwardly springpressed check valve 28. Each valve casing 27 is provided with a laterally projecting nipple 29. The cylinder shown in section in Fig. 2 is used as a high pressure cylinder, and the other cylinder is used as the lower pressure cylinder of the air compressor, and the spring 28a which closes the. valve 28, leading from the former cylinder, should be set to hold said valve closed, under,say, eight pounds pressure; while the corresponding valve which leads from the low pressure cylinder should be set to open under, say, about five pounds pressure. The

receiving end of the tube 16 is connected tov the nipple 29 of the valve casing that receives air from the high pressure cylinder. The receiving end of the tube 17 is connected to the nipple 29 of the valve casing that is connected to the low pressure cylinder of the compressor.

Operation: The teat cups having been applied, as already indicated, and the compressor started into action, thefmilking operation will be substantially as follows: Under rotation of the crank shaft 22, the air will be compressed in the high pressure cylinder and will be delivered into the choking ring 5, slightly before the air from the low pressure cylinder will be delivered into the squeezing pad 8. The result of this is that while the main and lower portion of the teat is left expanded and filled with milk, the neck of the teat is pressed together, as shown in Fig. 5, thereby preventin the milk from being subsequently, forced/ ack wardly into the bag, by the pressinfr action of the squeezing pad. ImmediateIy after the teat has thus been choked close to the bag, the ad 8 is expanded and presses or squeezes thereby positively forces the milk out of the lower end of the nipple. This is an action `almost identically like that which takes place in the hand milkin action, and as the Iparts which expand agalnst the nipple are all made of soft rubber, no irritation or strain is produced on the teat. Furthermore, as already indicated, the increasing thickness of the wall of the squeezing pad in a downward direction, causes the squeezing pressure to be applied first at the upper and then gradually toward the tip of the teat. Thus, the milking action is produced Without suction and without any action, whatever, which will produce a soreness either on the teat or on the bag. Returning now to the further action of the compressor, it should be noted that whenever the pressure on the high pressure cylinder exceeds the predetermined desired amount, to-wit, as assumed, eight pounds, the valve 28 will be opened up and air will be discharged from the cylinder. On the other hand, whenever there is a tendency to produce a artial vacuum in the said high pressure cy inder, air will be drawn in by opening the check valve 26. The same kind of an action takes 1place in respect to the corresponding valves 26 and 28 of the low pressure cylinder. Under return or downward movements of the pistons of the said high pressure and-low pressure cylinders, air will be drawn back respectively, from the choking ring and squeezing pad, so that these flexible elements will assume their normal shape with each downward movement of the piston and will be inflated to the predetermined pressures under upward movements of the pistons.

What I claim is:

' 1. A teat cup having anelastic pneumatic teat choking ring, and an elastic pneumatic teat squeezing pad, the latter operating to press the teat laterally to one side of the axis of said ring.

`V2. A teat cup having an elastic pneumatic teat choking ring, and an elastic pneumatic teat squeezing pad, the latter operating to press the teat laterally to one side of the axis of said ring, and a rigid casin ycontaining said ring and pad, a portion o said casing affording a wall agalnst which the teat is pressed by the said pad.

nomen matic means for roducin air pressure in-l dependently in i oking ring and squeezing pedi.,

e., A teat cup havin :an elastic pneumatic tene choking ringen 'gan elastic pneumatic teat squeezing adggthe latter operating to press the teat eteall'yr to one side of the axis of sai@ ring, in". combination with automatic means for 'noducin air pressure independently in tno saidi c cking rin and squeezing pad; timed and arranged t to produce a relatively high pressure in said choking ring,Z and later e reieeiveiy low pressure in said squeezing pm.

5. yA teat cup havi an elastic pneumatic teat choking ring,an an elastic pneumatic tent squeezing aci, the latter operating to press the ieat aterally to 'one side of the axis of said ring, in combination with automatie means fordproducing air ressurc 1n said ring and pa the former a ead of the latter. i

Iniestimon whereof I aiiix my signature in presence o two witnesses.

erro GEORGE einem,

Witnesses:

Bmw :a: l: HARRY D. Kummer), 

